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// SPDX-License-Identifier: GPL-2.0
/*
* StarFive JH7110 Always-On Clock Driver
*
* Copyright (C) 2022 Emil Renner Berthing <kernel@esmil.dk>
* Copyright (C) 2022 StarFive Technology Co., Ltd.
*/
#include <linux/clk-provider.h>
#include <linux/io.h>
#include <linux/platform_device.h>
#include <dt-bindings/clock/starfive,jh7110-crg.h>
#include "clk-starfive-jh7110.h"
/* external clocks */
#define JH7110_AONCLK_OSC (JH7110_AONCLK_END + 0)
#define JH7110_AONCLK_GMAC0_RMII_REFIN (JH7110_AONCLK_END + 1)
#define JH7110_AONCLK_GMAC0_RGMII_RXIN (JH7110_AONCLK_END + 2)
#define JH7110_AONCLK_STG_AXIAHB (JH7110_AONCLK_END + 3)
#define JH7110_AONCLK_APB_BUS (JH7110_AONCLK_END + 4)
#define JH7110_AONCLK_GMAC0_GTXCLK (JH7110_AONCLK_END + 5)
#define JH7110_AONCLK_RTC_OSC (JH7110_AONCLK_END + 6)
static const struct jh71x0_clk_data jh7110_aonclk_data[] = {
/* source */
JH71X0__DIV(JH7110_AONCLK_OSC_DIV4, "osc_div4", 4, JH7110_AONCLK_OSC),
JH71X0__MUX(JH7110_AONCLK_APB_FUNC, "apb_func", 0, 2,
JH7110_AONCLK_OSC_DIV4,
JH7110_AONCLK_OSC),
/* gmac0 */
JH71X0_GATE(JH7110_AONCLK_GMAC0_AHB, "gmac0_ahb", 0, JH7110_AONCLK_STG_AXIAHB),
JH71X0_GATE(JH7110_AONCLK_GMAC0_AXI, "gmac0_axi", 0, JH7110_AONCLK_STG_AXIAHB),
JH71X0__DIV(JH7110_AONCLK_GMAC0_RMII_RTX, "gmac0_rmii_rtx", 30,
JH7110_AONCLK_GMAC0_RMII_REFIN),
JH71X0_GMUX(JH7110_AONCLK_GMAC0_TX, "gmac0_tx",
CLK_SET_RATE_PARENT | CLK_SET_RATE_NO_REPARENT, 2,
JH7110_AONCLK_GMAC0_GTXCLK,
JH7110_AONCLK_GMAC0_RMII_RTX),
JH71X0__INV(JH7110_AONCLK_GMAC0_TX_INV, "gmac0_tx_inv", JH7110_AONCLK_GMAC0_TX),
JH71X0__MUX(JH7110_AONCLK_GMAC0_RX, "gmac0_rx", 0, 2,
JH7110_AONCLK_GMAC0_RGMII_RXIN,
JH7110_AONCLK_GMAC0_RMII_RTX),
JH71X0__INV(JH7110_AONCLK_GMAC0_RX_INV, "gmac0_rx_inv", JH7110_AONCLK_GMAC0_RX),
/* otpc */
JH71X0_GATE(JH7110_AONCLK_OTPC_APB, "otpc_apb", 0, JH7110_AONCLK_APB_BUS),
/* rtc */
JH71X0_GATE(JH7110_AONCLK_RTC_APB, "rtc_apb", 0, JH7110_AONCLK_APB_BUS),
JH71X0__DIV(JH7110_AONCLK_RTC_INTERNAL, "rtc_internal", 1022, JH7110_AONCLK_OSC),
JH71X0__MUX(JH7110_AONCLK_RTC_32K, "rtc_32k", 0, 2,
JH7110_AONCLK_RTC_OSC,
JH7110_AONCLK_RTC_INTERNAL),
JH71X0_GATE(JH7110_AONCLK_RTC_CAL, "rtc_cal", 0, JH7110_AONCLK_OSC),
};
static struct clk_hw *jh7110_aonclk_get(struct of_phandle_args *clkspec, void *data)
{
struct jh71x0_clk_priv *priv = data;
unsigned int idx = clkspec->args[0];
if (idx < JH7110_AONCLK_END)
return &priv->reg[idx].hw;
return ERR_PTR(-EINVAL);
}
static int jh7110_aoncrg_probe(struct platform_device *pdev)
{
struct jh71x0_clk_priv *priv;
unsigned int idx;
int ret;
priv = devm_kzalloc(&pdev->dev,
struct_size(priv, reg, JH7110_AONCLK_END),
GFP_KERNEL);
if (!priv)
return -ENOMEM;
spin_lock_init(&priv->rmw_lock);
priv->dev = &pdev->dev;
priv->base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(priv->base))
return PTR_ERR(priv->base);
for (idx = 0; idx < JH7110_AONCLK_END; idx++) {
u32 max = jh7110_aonclk_data[idx].max;
struct clk_parent_data parents[4] = {};
struct clk_init_data init = {
.name = jh7110_aonclk_data[idx].name,
.ops = starfive_jh71x0_clk_ops(max),
.parent_data = parents,
.num_parents =
((max & JH71X0_CLK_MUX_MASK) >> JH71X0_CLK_MUX_SHIFT) + 1,
.flags = jh7110_aonclk_data[idx].flags,
};
struct jh71x0_clk *clk = &priv->reg[idx];
unsigned int i;
for (i = 0; i < init.num_parents; i++) {
unsigned int pidx = jh7110_aonclk_data[idx].parents[i];
if (pidx < JH7110_AONCLK_END)
parents[i].hw = &priv->reg[pidx].hw;
else if (pidx == JH7110_AONCLK_OSC)
parents[i].fw_name = "osc";
else if (pidx == JH7110_AONCLK_GMAC0_RMII_REFIN)
parents[i].fw_name = "gmac0_rmii_refin";
else if (pidx == JH7110_AONCLK_GMAC0_RGMII_RXIN)
parents[i].fw_name = "gmac0_rgmii_rxin";
else if (pidx == JH7110_AONCLK_STG_AXIAHB)
parents[i].fw_name = "stg_axiahb";
else if (pidx == JH7110_AONCLK_APB_BUS)
parents[i].fw_name = "apb_bus";
else if (pidx == JH7110_AONCLK_GMAC0_GTXCLK)
parents[i].fw_name = "gmac0_gtxclk";
else if (pidx == JH7110_AONCLK_RTC_OSC)
parents[i].fw_name = "rtc_osc";
}
clk->hw.init = &init;
clk->idx = idx;
clk->max_div = max & JH71X0_CLK_DIV_MASK;
ret = devm_clk_hw_register(&pdev->dev, &clk->hw);
if (ret)
return ret;
}
ret = devm_of_clk_add_hw_provider(&pdev->dev, jh7110_aonclk_get, priv);
if (ret)
return ret;
return jh7110_reset_controller_register(priv, "rst-aon", 1);
}
static const struct of_device_id jh7110_aoncrg_match[] = {
{ .compatible = "starfive,jh7110-aoncrg" },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, jh7110_aoncrg_match);
static struct platform_driver jh7110_aoncrg_driver = {
.probe = jh7110_aoncrg_probe,
.driver = {
.name = "clk-starfive-jh7110-aon",
.of_match_table = jh7110_aoncrg_match,
},
};
module_platform_driver(jh7110_aoncrg_driver);
MODULE_AUTHOR("Emil Renner Berthing");
MODULE_DESCRIPTION("StarFive JH7110 always-on clock driver");
MODULE_LICENSE("GPL");
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